CN102430877A - Metal powder type flux-cored wire and preparation and application thereof - Google Patents
Metal powder type flux-cored wire and preparation and application thereof Download PDFInfo
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- CN102430877A CN102430877A CN2011103453550A CN201110345355A CN102430877A CN 102430877 A CN102430877 A CN 102430877A CN 2011103453550 A CN2011103453550 A CN 2011103453550A CN 201110345355 A CN201110345355 A CN 201110345355A CN 102430877 A CN102430877 A CN 102430877A
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Abstract
The invention discloses a metal powder type flux-cored wire comprising a carbon steel skin and powders filled inside it. The powders comprise the following components and percent thereof accounting total weight of the flux-cored wire: TiO2 0.20 to 1.5%, SiO2 0.1-0.5%, any one of Na2O or K2O or mixture with optimal mixing ratio 0.1-0.50%, SiO 0.15-0.65%, Mg 0.08-0.45%, Mn 0.9-2.4%, Cr 0.15-1.0%, Ni 1.5-4.5%, Ti 0.15-0.45%, B 0.004-0.012% and any one of NaF or CaF2 or mixture with optimal mixing ratio 0.5-1.5%. When the flux-cored wire is being welded, slag quantity on the welding seam surface is small, the deposition efficiency is high, the sputtering is few, the flux-cored wire has good low temperature impact toughness and anticracking ability, and diffusible hydrogen reaches the super low hydrogen level.
Description
Technical field
The present invention relates to metal solder and use welding material, specifically refer to a kind of carbon dioxide or rich argon (80%Ar+20%CO
2) gas shield is with low-alloy steel metal powder core pattern flux-cored wire and preparation thereof.
Background technology
Therefore plurality of advantages such as flux-cored wire is a kind of high-efficiency welding material, has the welding efficiency height, shortens welding interval, and welding technological properties is good, and appearance of weld is attractive in appearance, and welding deformation is little are used widely in the welding of steel constructions such as boats and ships, bridge.
At present; Flux-cored wire mainly comprises titanium type, alkali type and titanium-alkali type on the market; And the existing abroad development to a certain degree of metal powder core pattern flux-cored wire, but domestic research about this kind flux-cored wire is less, in the low-alloy steel flux-cored wire standard GB/T 17493-2008 of new revision; That low-alloy is included with metal powder core pattern flux-cored wire, visible metal powder core pattern flux-cored wire is more and more paid attention to by China.
Because major part is iron powder and alloying substance in the filling powder of metal powder core pattern flux-cored wire; The addition of slag former and arc stabilizer is relatively just few; Therefore the soft property of electric arc is just poor many; It is bigger with flue dust to splash during welding, causes processing performance relatively poor, is difficult in actual production, use.
Summary of the invention
The technical problem that the present invention will solve is the problem of existing metal powder core pattern flux-cored wire manufacturability difference.The present invention provides a kind of arc stability good metal powder core pattern flux-cored wire for the welding of existing Hi-Stren steel, and low-temperature impact toughness is good simultaneously, cracking resistance is good, diffusible hydrogen reaches ultralow hydrogen level.
In order to solve the problems of the technologies described above, the present invention provides a kind of metal powder core pattern flux-cored wire, comprises the carbon steel crust and is filled in the medicinal powder of the outer intracutaneous of carbon steel, and the percentage that said medicinal powder contains following composition and accounts for said flux-cored wire gross weight is:
TiO
2 0.20~1.5%；
SiO
2 0.1~0.5%；
Na
2O or K
2O a kind of or it is arbitrarily than mixture 0.1 ~ 0.50%;
Si 0.15~0.65%；
Mg 0.08~0.45%；
Mn 0.9~2.4%；
Cr 0.15~1.0%；
Ni 1.5~4.5%；
Ti 0.15~0.45%；
B 0.004~0.012%；
NaF or CaF
2A kind of or it is arbitrarily than mixture 0.5 ~ 1.5%.
Contain the C that accounts for said flux-cored wire gross weight 0.02 ~ 0.12% in carbon steel crust and the medicinal powder altogether.
The weight of medicinal powder is 16 ~ 20% of welding wire gross weight, and the surplus composition in the said medicinal powder is Fe.
The mass ratio of B/Ti is 0.02 ~ 0.03 in the composition of medicinal powder.
The mass ratio of Mn/Ni is 0.5 ~ 0.8 in the composition of medicinal powder.
The material of stating the carbon steel crust is a mild steel.The percentage by weight that composition in the said mild steel accounts for mild steel is: Mn 0.20 ~ 0.35%, Si≤0.028%, C≤0.035%, S≤0.015, P≤0.015%, N≤0.005%.
The present invention provides the method for the above-mentioned metal powder core pattern flux-cored wire of preparation, and step is following:
1), calculates the amount of needed raw material according to the amount of each composition of medicinal powder;
2) according to the required raw material of measuring: a kind of or its any mixture in rutile, quartz, feldspar, NaF or the fluorite, a kind of in magnesium powder, ferrosilicon, ferromanganese or the electrolytic manganese or its are arbitrarily than a kind of in mixture, crome metal or the little carbon chromium or it is arbitrarily than mixture, nickel powder, ferrotianium, B
2O
3Or a kind of in the ferro-boron or its mix arbitrarily than mixture and iron powder;
3) with the sealing mode of butt joint O type or overlap joint O type, with step 2) raw materials mixed is enclosed in the outer intracutaneous of carbon steel.
The present invention also provides the method for using above-mentioned metal powder core pattern flux-cored wire welding: during welding, adopt carbon dioxide or 80% Ar+20% CO
2Argon-rich gas shielded.
The invention has the beneficial effects as follows:
1, adopts metal powder core pattern slag system, cooperate carbon dioxide or rich argon (80%Ar+20%CO
2) gas shield, mainly be applicable to downhand welding and flat fillet weld.Face of weld produces the seldom quantity of slag, and the multilayer welding need not scarfing cinder, and deposition efficiency is high, and because the adding of stabilising arc material, it is little to splash when making welding, and flue dust is little, and appearance of weld is good, thereby has improved the welding efficiency when producing.Welding wire has good welding procedure adaptability, handles through the mass ratio of Ti/B, and the mass ratio of control Mn/Ni, the deposited metal stable mechanical property has good low-temperature impact toughness, and diffusible hydrogen reaches ultralow hydrogen level, and cold-crack resistance can be better.
2, raw material that the present invention adopts is existing on the market common raw material, and the source is wide, and cost is low, is fit to industrialized mass production, remarkable in economical benefits.
The specific embodiment
Below in conjunction with specific embodiment the present invention is described further so that those skilled in the art can better understand the present invention and implementing, but the embodiment that lifts not conduct to qualification of the present invention.
Metal powder core pattern flux-cored wire of the present invention comprises that the carbon steel crust is filled in the medicinal powder of the outer intracutaneous of carbon steel, and wherein, medicinal powder contains following composition and account for the percentage of welding wire gross weight following:
TiO
2 0.20~1.5%；
SiO
2 0.1~0.5%；
Na
2O or K
2O a kind of or it is arbitrarily than mixture 0.1 ~ 0.50%;
Si 0.15~0.65%；
Mg 0.08~0.45%；
Mn 0.9~2.4%；
Cr 0.15~1.0%；
Ni 1.5~4.5%；
Ti 0.15~0.45%；
B 0.004~0.012%；
NaF or CaF
2One or more any mixture 0.5 ~ 1.5%;
Wherein, contain the C that accounts for said flux-cored wire gross weight 0.02 ~ 0.12% altogether in carbon steel crust and the medicinal powder.
It is 16 ~ 20% that medicinal powder composition total content accounts for the welding wire gross weight, and all the other are Fe.
Flux-cored wire of the present invention adopts the sealing mode of butt joint O type or overlap joint O type, and medicinal powder is enclosed in the outer intracutaneous of carbon steel.
Mentality of designing of the present invention is following:
Adopt metal powder core pattern slag system, cooperate carbon dioxide or rich argon (80%Ar+20%CO during welding
2) gas protects, and is thin molten drop spray transfer when making this welding wire welding, the slag coverage rate is low; Deposition efficiency is high and do not have the sensitiveness of incomplete fusion; Mainly be applicable to downhand welding and flat fillet weld, when using the transition of short circuiting transfer or pulsed arc mode, also can use other position.Adopt the mode of Mn – Mg – Si combined deoxidation, reduce the oxygen content in the weld seam as far as possible.In the slag making component, add the stabilising arc material, can requirement to satisfy operative weldability.Add a large amount of iron powders, improve its deposition efficiency.Handle through Ti-B, control B/Ti 0.02 ~ 0.03, the Mn/Ni ratio is 0.5 ~ 0.8 ,-50 ℃ of low-temperature impact toughness 69J.Adopt this slag system, weld metal stable mechanical property, crack resistance are good, take corresponding measure in the production process, further control diffusible hydrogen content.
TiO
2, SiO
2, Na
2O+K
2O, NaF or CaF
2Be mineralogical composition in the medicine core powder:
TiO
2: regulate slag fusing point and viscosity, improve arc stability, can not add too much in the metal powder core pattern, therefore, addition is controlled to be 0.20 ~ 1.5%.
SiO
2: regulate slag fusing point and viscosity, improve appearance of weld, can not add too much in the metal powder core pattern, therefore, addition is controlled to be 0.10 ~ 0.50%.
Na
2O or K
2A kind of or its mixture: the Na of O, K are main arc stabilizers, and content suitably can improve arc stability, and minimizing is splashed, and too high levels then worsens technology, therefore, and Na
2O+K
2The O addition is controlled to be 0.1 ~ 0. 5%.
NaF or CaF
2One or both: NaF, CaF
2, the dehydrogenation agent reduces the weld seam diffusible hydrogen content.Addition very little the time arc stability bad, dehydrogenation scarce capacity, weld seam are prone to produce the pore load mould; Spatter and flue dust increased when addition was too many.Therefore, NaF or CaF
2One or both additions be controlled to be 0.5 ~ 1.5%.
Si, Mg, C, Mn, Cr, Ni, Ti, B, Fe account for the welding wire gross weight respectively and are:
Si 0.15~0.65%；
Mg 0.08~0.45%；
C 0.02~0.12%；
Mn 0.9~2.4%；
Cr 0.15~1.0%；
Ni 1.5~4.5%；
Ti 0.15~0.45%；
B 0.004~0.012%。
Si is important deoxidier, contains the oxygen content that a certain amount of Si can reduce weld metal in the welding wire, improves low-temperature impact toughness; Regulate the flowability of molten iron, addition is less than at 0.15% o'clock can not embody above-mentioned characteristic, becomes sticky greater than 0.65% o'clock molten iron; Weld strength is too high, and low-temperature impact toughness reduces.Therefore be limited to 0.15%-0.65%.
Mg is strong deoxidier; Improve low-temperature impact toughness; Addition is less than at 0.08% o'clock and improves the low-temperature impact toughness ability and deoxidizing capacity is not enough, greater than 0.45% o'clock because deoxidation products contains eliminating and the appearance of weld that fusing point rising setting rate that magnesium oxide makes slag accelerates to be unfavorable for weld seam gas.Therefore be limited to 0.08%-0.45%.
C comprises C and the C in the medicine core in the steel crust, can the refinement molten drop, increase arc stiffness.Splash and flue dust from reduction; C is low more good more, hopes below 0.02%, but collateral security weld metal mechanical property; The low excessively raising of intensity and the molten iron of being unfavorable for of content flows; And from raw material, carbon is limited to more low-level meeting increases more cost, and the C content that therefore limits in the welding wire is 0.02 ~ 0.12%.Obviously reduce the flue dust and the increase of splashing greater than 0.12% o'clock low-temperature impact toughness.
Mn is main deoxidier, reduces the oxygen content of weld metal, increases weld metal intensity and crack resistance; Improve low-temperature impact toughness, it is mobile to regulate molten iron, and addition is less than at 0.9% o'clock; It is not enough to embody above-mentioned characteristic, too high greater than 2.4% o'clock weld strength, and low-temperature impact toughness reduces.Therefore be limited to 0.9 ~ 2.4%.
Cr has the effect that improves intensity and quenching degree, but Cr also reduces the low-temperature flexibility and the percentage elongation of weld seam simultaneously, so must control add, and can obtain good low-temperature impact toughness in order to guarantee weld metal, and the adding scope that limits Cr content is 0.15 ~ 1.0%.
Ni is an alloying element important in the weld metal, can improve the low-temperature flexibility of weld metal, reduce ductile-brittle transition temperature, but the nickel too high levels then can increase hot tearing sensitiveness.According to the alloy requirement, the adding scope is 1.5 ~ 4.5%.
Ti is strong deoxidier, play an important role for the oxygen content that reduces in the weld metal, but too high levels will cause transitting to the Ti too high levels in the weld seam, influence performance.Through test, adding fashionablely with B, when B/Ti is 0.02 ~ 0.03, improve playing a role clearly of impact flexibility.
But the B crystal grain thinning can improve low-temperature impact toughness, is adding the fashionable significant raising impact flexibility effect that has simultaneously with C, Si, Mn, Ti.
Fe is an iron powder, can improve conditions at the arc, regulates molten iron fusing point and viscosity, and surplus adds.
Impurity elements such as the S in welding wire medicine core and the carbon steel crust, P, N have the crackle that increases weld seam, reduce weld seam low-temperature impact toughness tendency, must carry out strict control.Impurity elements such as S, P are satisfying under the situation of material standard in medicine core and the carbon steel crust, control to minimum as far as possible.
Through following concrete example the present invention is done further detailed description, but the present invention is not limited to these embodiment.
One, the preparation of metal powder core pattern flux-cored wire
The steel crust of flux-cored wire adopts the mild steel steel band, and its chemical composition is seen table 1.
The chemical composition of table 1 steel band:
The chemical composition of medicine core powder and raw material constitute sees table 2.
Table 2 medicine core powder constitutes
Charge core powder in mild steel steel band (0.9X14mm), filling rate 16 ~ 20% through drawing moulding tube reducing, is processed the finished product welding wire of diameter 1.2mm.
Press each component content proportioning of medicine core, adopt different filling rate drawings to process flux-cored wire and make an experiment, mass percent %, filling rate % that its composition accounts for flux-cored wire see table 3.
Table 3 composition proportion, filling rate test
Two, welding procedure and welding wire performance
The flux-cored wire that makes with embodiment 1 ~ 5 carries out soldering test, adopts carbon dioxide or rich argon (80%Ar+20%CO
2) gas shield, welding conditions are seen table 4.
Table 4 welding conditions
1, welding wire process performance test
Adopt carbon dioxide or rich argon (80%Ar+20%CO
2) protect and carry out the downhand position welding, welding wire is sent to stable, arc stability, and molten drop is tiny can to form spray transfer, and it is little to splash, and smog is less, and slag is thin to be prone to take off, the appearance of weld light.
2, test welding wire mechanical property test
Adopt carbon dioxide or rich argon (80%Ar+20%CO
2) gas shield, 10 ° of test plate (panel) angles of bevel, size 20 * 150 * 300mm, the downhand position welding, the welding wire deposited metal mechanical property of embodiment 1 ~ 5 is seen table 5:
Table 5 deposited metal mechanical property
3, welding wire deposited metal diffusible hydrogen content (mercury process)
The flux-cored wire that makes with embodiment 1 ~ 5 is that example is carried out diffusible hydrogen content mensuration (three samples)
Table 6 deposited metal diffusible hydrogen content (mercury process)
The deposited metal diffusible hydrogen content mercury process of the flux-cored wire that warp mensuration embodiment 1 ~ 5 makes detects all＜5.0mL/100g, reaches ultralow hydrogen level.
4, oblique Y cracking test
Adopt embodiment 1 ~ 5 to carry out oblique Y cracking test, weld preheating to 80 ℃, through detecting, face crack rate, section crack rate, root crack rate be 0% (25 ℃ * 75%RH).
5, be respectively 94%, 95%, 93%, 93%, 91% through the deposition efficiency of measuring the flux-cored wire that embodiment 1 ~ 5 makes.
The above embodiment is the preferred embodiment that proves absolutely that the present invention lifts, and protection scope of the present invention is not limited thereto.Being equal to that the technical staff in present technique field is done on basis of the present invention substitutes or conversion, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (9)
1. metal powder core pattern flux-cored wire comprises the carbon steel crust and is filled in the medicinal powder of the outer intracutaneous of carbon steel, it is characterized in that, the percentage that said medicinal powder contains following composition and accounts for said flux-cored wire gross weight is:
TiO
2 0.20~1.5%；
SiO
2 0.1~0.5%；
Na
2O or K
2O a kind of or it is arbitrarily than mixture 0.1 ~ 0.50%;
Si 0.15~0.65%；
Mg 0.08~0.45%；
Mn 0.9~2.4%；
Cr 0.15~1.0%；
Ni 1.5~4.5%；
Ti 0.15~0.45%；
B 0.004~0.012%；
NaF or CaF
2A kind of or it is arbitrarily than mixture 0.5 ~ 1.5%.
2. metal powder core pattern flux-cored wire according to claim 1 is characterized in that, contains the C that accounts for said flux-cored wire gross weight 0.02 ~ 0.12% altogether in said carbon steel crust and the medicinal powder.
3. metal powder core pattern flux-cored wire according to claim 2 is characterized in that the weight of said medicinal powder is 16 ~ 20% of welding wire gross weight, and the surplus composition in the said medicinal powder is Fe.
4. metal powder core pattern flux-cored wire according to claim 1 is characterized in that the mass ratio of B/Ti is 0.02 ~ 0.03 in the composition of said medicinal powder.
5. metal powder core pattern flux-cored wire according to claim 1 is characterized in that the mass ratio of Mn/Ni is 0.5 ~ 0.8 in the composition of said medicinal powder.
6. metal powder core pattern flux-cored wire according to claim 1 is characterized in that the material of said carbon steel crust is a mild steel.
7. metal powder core pattern flux-cored wire according to claim 6 is characterized in that the percentage by weight that the composition in the said mild steel accounts for mild steel is: Mn 0.20 ~ 0.35%, Si≤0.028%, C≤0.035%, S≤0.015, P≤0.015%, N≤0.005%.
8. prepare the method for each described metal powder core pattern flux-cored wire of claim 1 ~ 7, it is characterized in that step is following:
1), calculates the amount of needed raw material according to the amount of each composition of medicinal powder;
2) according to the required raw material of measuring: a kind of or its any mixture in rutile, quartz, feldspar, NaF or the fluorite, a kind of in magnesium powder, ferrosilicon, ferromanganese or the electrolytic manganese or its are arbitrarily than a kind of in mixture, crome metal or the little carbon chromium or it is arbitrarily than mixture, nickel powder, ferrotianium, B
2O
3Or a kind of in the ferro-boron or its mix arbitrarily than mixture and iron powder;
3) with the sealing mode of butt joint O type or overlap joint O type, with step 2) raw materials mixed is enclosed in the outer intracutaneous of carbon steel.
9. application rights requires the method for 1 ~ 7 each described metal powder core pattern flux-cored wire welding, it is characterized in that, during welding, adopts carbon dioxide or 80% Ar+20% CO
2Argon-rich gas shielded.
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|---|---|---|---|---|
| CN102974956A (en) * | 2012-11-29 | 2013-03-20 | 武汉铁锚焊接材料股份有限公司 | Surfacing welding flux-cored wire |
| CN103737198A (en) * | 2014-01-15 | 2014-04-23 | 四川大西洋焊接材料股份有限公司 | Gas-shielded flux-cored wire for stainless steel welding |
| CN103962746A (en) * | 2014-05-08 | 2014-08-06 | 广东省工业技术研究院(广州有色金属研究院) | Gas shield flux-cored wire for electric arc welding |
| CN105057925A (en) * | 2015-07-30 | 2015-11-18 | 洛阳双瑞特种合金材料有限公司 | Metal powder core-type seamless flux-cored wire for angle welding |
| CN105473277A (en) * | 2013-07-12 | 2016-04-06 | 株式会社神户制钢所 | Flux-cored wire for build-up welding |
| CN106513943A (en) * | 2016-12-13 | 2017-03-22 | 江苏振光电力设备制造有限公司 | Efficient welding method of metal powder core flux-cored wires |
| CN108436322A (en) * | 2018-06-15 | 2018-08-24 | 天津市金桥焊材集团有限公司 | A kind of bridge steel high-strength and high ductility iron powder type flux-cored wire and its application |
| JP2018192518A (en) * | 2017-05-22 | 2018-12-06 | 新日鐵住金株式会社 | Flux-cored wire for gas shield arc welding, and manufacturing method of weld joint |
| US10668572B2 (en) | 2016-11-16 | 2020-06-02 | Lincoln Global, Inc. | Welding electrode wires having alkaline earth metals |
| CN112475669A (en) * | 2020-11-20 | 2021-03-12 | 济南市金材焊接材料有限公司 | Silicon-calcium type sintered flux and preparation method thereof |
| CN113579549A (en) * | 2021-08-11 | 2021-11-02 | 山东索力得焊材股份有限公司 | Metal powder core type flux-cored wire |
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|---|---|---|---|---|
| CN102974956A (en) * | 2012-11-29 | 2013-03-20 | 武汉铁锚焊接材料股份有限公司 | Surfacing welding flux-cored wire |
| CN102974956B (en) * | 2012-11-29 | 2014-11-05 | 武汉铁锚焊接材料股份有限公司 | Surfacing welding flux-cored wire |
| CN105473277A (en) * | 2013-07-12 | 2016-04-06 | 株式会社神户制钢所 | Flux-cored wire for build-up welding |
| CN103737198A (en) * | 2014-01-15 | 2014-04-23 | 四川大西洋焊接材料股份有限公司 | Gas-shielded flux-cored wire for stainless steel welding |
| CN103737198B (en) * | 2014-01-15 | 2016-01-06 | 四川大西洋焊接材料股份有限公司 | A kind of stainless steel welded gas-shielded flux-cored wire |
| CN103962746A (en) * | 2014-05-08 | 2014-08-06 | 广东省工业技术研究院(广州有色金属研究院) | Gas shield flux-cored wire for electric arc welding |
| CN103962746B (en) * | 2014-05-08 | 2016-06-08 | 广东省工业技术研究院(广州有色金属研究院) | A kind of arc welding gas shielded flux cored wire |
| CN105057925A (en) * | 2015-07-30 | 2015-11-18 | 洛阳双瑞特种合金材料有限公司 | Metal powder core-type seamless flux-cored wire for angle welding |
| US10668572B2 (en) | 2016-11-16 | 2020-06-02 | Lincoln Global, Inc. | Welding electrode wires having alkaline earth metals |
| US11247291B2 (en) | 2016-11-16 | 2022-02-15 | Lincoln Global, Inc. | Welding electrode wires having alkaline earth metals |
| CN106513943B (en) * | 2016-12-13 | 2018-09-04 | 江苏振光电力设备制造有限公司 | A kind of metal powder-cored wire high-efficiency welding method |
| CN106513943A (en) * | 2016-12-13 | 2017-03-22 | 江苏振光电力设备制造有限公司 | Efficient welding method of metal powder core flux-cored wires |
| JP2018192518A (en) * | 2017-05-22 | 2018-12-06 | 新日鐵住金株式会社 | Flux-cored wire for gas shield arc welding, and manufacturing method of weld joint |
| CN108436322A (en) * | 2018-06-15 | 2018-08-24 | 天津市金桥焊材集团有限公司 | A kind of bridge steel high-strength and high ductility iron powder type flux-cored wire and its application |
| CN108436322B (en) * | 2018-06-15 | 2021-08-24 | 天津市金桥焊材集团股份有限公司 | High-strength high-toughness iron powder type flux-cored wire for bridge steel and application thereof |
| CN112475669A (en) * | 2020-11-20 | 2021-03-12 | 济南市金材焊接材料有限公司 | Silicon-calcium type sintered flux and preparation method thereof |
| CN113579549A (en) * | 2021-08-11 | 2021-11-02 | 山东索力得焊材股份有限公司 | Metal powder core type flux-cored wire |
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Application publication date: 20120502 |